Assuming you’re on board with Grid (Should I still be using uppercase? Not sure.), it’s time to learn how to use it. I first played with it using the cheat sheet on CSS Tricks, but the game by Thomas Park is opening all the doors for me. It’s simple, incremental, and seems pretty comprehensive. The “levels” are so small that you can do a few at a time and keep the tab open for later. I really encourage you to make use of this as I have.